Describe the mechanism of stomatal opening

Stomata are small pores located on the surface of plant leaves and stems that regulate gas exchange, including the uptake of carbon dioxide (CO2) for photosynthesis and the release of oxygen (O2) and water vapor. The opening and closing of stomata are tightly regulated processes controlled by various internal and external factors. The mechanism of stomatal opening:

1. Guard cell turgor pressure: Guard cells, which flank each stoma, control its opening and closing. When guard cells are turgid (filled with water), they curve outwards, causing the stomatal pore to open. Turgor pressure ___ ____ ______ ____ ______ _________ _______ ________.
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